Want to run 255/75/17 tires

New to your forum. Been in the XJ world for 15 years or more. I acquired a set of 17 inch Rubicon rims with some 255/75/17 Cooper A/T tires. There supposed to be metric 32's. I have a 99 limited G.C. How much lift will I need to run those tires and be able to done some trail wheeling. Thanks